[Jim Sachs]

Apparently we're talking about an entirely different problem here. The blue wash is there on both monitors, it just doesn't come down far enough on the second one. The problem that everyone had been reporting was that the wash was not displaying at all, which caused the fish to leave trails across the whole background.

Your second render unit is only painting down to the gravel, and reporting that size window to my program, which (believing what it is told) paints the background down to 77% of that size. Since the reported window size is too short, so is the background size.

This is one of many multi-monitor problems that I have no idea how to fix. The nVidia DualView scheme opens up another can of worms.